论文部分内容阅读
杏芽瘿是甘肃省河西、中部、陇东等地区杏树上发生已久的一种害状。近年来,蔓延很快,为害甚重。其中由梅下毛瘿螨Acalitus phloeocoptes(Nalepa)引起的芽瘿已在武威、张掖发现,受害枝干形成大小不等的瘿瘤。该螨主要以抱卵成虫在活瘿瘤的芽丛内越冬。室内以50ppm激动素保鲜杏鳞片进行单体饲养,及室外群体发育进程观察,结果基本一致。17～20℃,卵期4～6天,若虫期5～6天,成虫期3～4天,完成一代约12～16天。在调查的20个杏树品种中,大偏头受害最重,其次为毛杏。而实生5号、8号尚未发现受害。试验的9种药剂中,50％克螨特、40％乐果防效分别为85～98％及81～93％,而10％天王星为68～91％。
Apricot bud is the Hexi, Gansu Province, Central, Longdong and other areas of apricot tree has long been a kind of harm. In recent years, the spread has been very rapid and very serious. Among them, buds caused by Acalitus phloeocoptes (Nalepa) have been found in Wuwei and Zhangye, and the affected branches form tumors of different sizes. The mite is predominantly larvae of adult living in the tumorous bud clusters of winter. Indoors, 50ppm kinetin was used to keep the apricot scales for monomer feeding, and the outdoor population development process was observed. The results were basically the same. 17-20 ℃, eggs 4-6 days, nymphs 5-6 days, adult 3-4 days, to complete the generation of about 12-16 days. Of the 20 apricot trees surveyed, Big Mouth suffered the most damage, followed by Mao Xing. The real 5th and 8th have not found the victim. Of the 9 tested agents, 50% propargite and 40% dimethoate were 85-98% and 81-93% respectively, while 10% Uranus was 68-91%.